## A point charge of -4.28 pC is fixed on the y-axis, 2.79 mm from the origin. What is the electric field produced by this charge at point P, w

Question

A point charge of -4.28 pC is fixed on the y-axis, 2.79 mm from the origin. What is the electric field produced by this charge at point P, which is on the x-axis, 9.83 mm from the origin

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3 years 2021-08-18T21:03:57+00:00 1 Answers 142 views 0

## Answers ( )

E = (-3.61^i+1.02^j) N/C

magnitude E = 3.75N/C

Explanation:

In order to calculate the electric field at the point P, you use the following formula, which takes into account the components of the electric field vector:

(1)

Where the minus sign means that the electric field point to the charge.

k: Coulomb’s constant = 8.98*10^9Nm^2/C^2

q = -4.28 pC = -4.28*10^-12C

r: distance to the charge from the point P

The point P is at the point (0,9.83mm)

θ: angle between the electric field vector and the x-axis

The angle is calculated as follow:

The distance r is:

You replace the values of all parameters in the equation (1):

The electric field is E = (-3.61^i+1.02^j) N/C with a a magnitude of 3.75N/C